Prevalence of Endogenous CD34+ Adipose Stem Cells Predicts Human Fat Graft Retention in a Xenograft Model

Fat grafting is a promising technique for soft-tissue augmentation, although graft retention is highly unpredictable and factors that affect graft survival have not been well defined. Because of their capacity for differentiation and growth factor release, adipose-derived stem cells may have a key r...

Full description

Saved in:

Bibliographic Details
Published in:	Plastic and reconstructive surgery (1963) Vol. 132; no. 4; pp. 845 - 858
Main Authors:	Philips, Brian J., Grahovac, Tara L., Valentin, Jolene E., Chung, Christopher W., Bliley, Jacqueline M., Pfeifer, Melanie E., Roy, Sohini B., Dreifuss, Stephanie, Kelmendi-Doko, Arta, Kling, Russell E., Ravuri, Sudheer K., Marra, Kacey G., Donnenberg, Vera S., Donnenberg, Albert D., Rubin, J. Peter
Format:	Journal Article
Language:	English
Published:	United States American Society of Plastic Surgeons 01-10-2013
Subjects:	Adipogenesis Adult Adult Stem Cells - metabolism Adult Stem Cells - transplantation Animals Antigens, CD34 - metabolism Cell Differentiation Female Graft Survival Humans Injections, Subcutaneous Male Mice Mice, Nude Models, Animal Predictive Value of Tests Prevalence Subcutaneous Fat, Abdominal - cytology Surgery, Plastic - methods Transplantation, Heterologous - methods Young Adult
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	Fat grafting is a promising technique for soft-tissue augmentation, although graft retention is highly unpredictable and factors that affect graft survival have not been well defined. Because of their capacity for differentiation and growth factor release, adipose-derived stem cells may have a key role in graft healing. The authors' objective was to determine whether biological properties of adipose-derived stem cells present within human fat would correlate with in vivo outcomes of graft volume retention. Lipoaspirate from eight human subjects was processed using a standardized centrifugation technique and then injected subcutaneously into the flanks of 6-week-old athymic nude mice. Graft masses and volumes were measured, and histologic evaluation, including CD31+ staining for vessels, was performed 8 weeks after transplantation. Stromal vascular fraction isolated at the time of harvest from each subject was analyzed for surface markers by multiparameter flow cytometry, and also assessed for proliferation, differentiation capacity, and normoxic/hypoxic vascular endothelial growth factor secretion. Wide variation in percentage of CD34+ progenitors within the stromal vascular fraction was noted among subjects and averaged 21.3 ± 15 percent (mean ± SD). Proliferation rates and adipogenic potential among stromal vascular fraction cells demonstrated moderate interpatient variability. In mouse xenograft studies, retention volumes ranged from approximately 36 to 68 percent after 8 weeks, with an overall average of 52 ± 11 percent. A strong correlation (r = 0.78, slope = 0.76, p < 0.05) existed between stromal vascular fraction percentage of CD34+ progenitors and high graft retention. Inherent biological differences in adipose tissue exist between patients. In particular, concentration of CD34+ progenitor cells within the stromal vascular fraction may be one of the factors used to predict human fat graft retention.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0032-1052 1529-4242
DOI:	10.1097/PRS.0b013e31829fe5b1